Improving the optical, electrical and dielectric characteristics of ZnO nanoparticles through (Fe + Al) addition for optoelectronic applications

Saadi, H.; Benzarti, Z.; Sanguino, P.; Hadouch, Youness; Mezzane, D.; Khirouni, K.; Abdelmoula, N.; Khemakhem, H.

doi:10.1007/s00339-022-05847-9

Cited by 27 publications

(10 citation statements)

References 56 publications

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“…Similar results have been reported by P. Pascariu et al for rare earth doped ZnO nanostructures in which the band gap was 2.80, 2.81 eV, 2.82 eV, and 2.85 eV for un-doped ZnO, Sm, Er and La doped ZnO, respectively [ 37 ]. There are claims that even the co-doping (Fe+Al) may lead to a decrease in the band gap of ZnO nanoparticles synthesized through the co-precipitation method, and may improve the optoelectronic properties of ZnO nanoparticles [ 38 ]. The band gap energy of a semiconductor material is generally determined by the crystal imperfection caused by the dopant type and amount, as well as other factors.…”

Section: Resultsmentioning

confidence: 99%

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

et al. 2023

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Antibiotic water contamination is a growing environmental problem in the present day. As a result, water treatment is required for its reduction and elimination. Due to their important role in resolving this issue, photocatalysts have drawn a great deal of interest over the past few decades. When non-biodegradable organic matter is present in polluted water, the photo catalytic process, which is both environmentally friendly and an improved oxidation method, can be an effective means of remediation. In this regard, we report the successful synthesis of pure phased rare earth doped ZnO nanoparticles for tetracycline degradation. The prepared catalysts were systematically characterized for structural, optical, and magnetic properties. The optical band gap was tailored by rare earth doping, with redshift for Sm and Dy doped nanoparticles and blueshift for Nd doped ZnO nanoparticles. The analysis of photoluminescence spectra revealed information about the defect chemistry of all synthesised nanoparticles. Magnetic studies revealed that all synthesized diluted magnetic semiconductors exhibit room temperature ferromagnetism and can be employed for spintronic applications. Moreover, Dy doped ZnO nanoparticles were found to exhibit a maximum degradation efficiency of 74.19% for tetracycline (TCN) removal. The synthesized catalysts were also employed for the degradation of Malachite green (MG), and Crystal violet (CV) dyes. The maximum degradation efficiency achieved was 97.18% for MG and 98% for CV for Dy doped ZnO nanoparticles. The degradation mechanism involved has been discussed in view of the reactive species determined from scavenging experiments.

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Section: Resultsmentioning

confidence: 99%

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

et al. 2023

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“…These results agree with previous studies. 32,35,36 Also, ZnO:Al films exhibit a preferential orientation toward the c-axis, with a hexagonal structure. However, the size of the crystal decreases with an increase in the amount of Al 3+ .…”

Section: Xrd Of Al:zno Filmsmentioning

confidence: 99%

Al³⁺-modified ZnO thin film sensor fabricated by the sputtering method: Characterization and a carbon monoxide gas detection study

Al-Maamori,

Al-Jamal,

Habeeb

et al. 2024

Journal of Chemical Research

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Al: ZnO films are prepared by spraying from the pure ZnO and Al with doping at different weight ratios 0.01, 0.03, 0.05, and 0.09. X-ray diffraction, atomic force microscopy, and energy-dispersive X-ray spectroscopy are used to analyze the structural properties of the films. The results of X-ray diffraction prove that polycrystalline Al:ZnO with a hexagonal wurtzite structure is preferentially oriented on the c-axis, and this is further confirmed by transmission electron microscopy. In addition, 0.09 wt% of Al-doping shows high orientation and homogeneity with the (002) plane, which leads to an increase in the surface roughness properties of the thin films as the root main square by 57.4%. The annealing process at high temperatures increases the conductivity of the Al:ZnO films. The rate of electronic mobility increases slightly with low doping and decreases with increasing doping until it reaches its lowest value (0.1 cm2 (V.s)−1) at a doping ratio of 0.035 wt%. The samples show considerable response for CO at 80 ppm gas concentration with gas responses of 85% and 40% at 90 °C for 0.03 wt% Al:ZnO and ZnO films, respectively. The overall study observed that fabricated sensor Al3+-doped ZnO is reliable and very rapid in detecting carbon monoxide vapors at moderately high temperatures and low gas concentrations.

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“…Additionally, the material's inhomogeneities and imperfections cause leakage or absorption currents, which result in dielectric loss. [73]…”

Section: Permitivity Studymentioning

confidence: 99%

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄

Miladi,

Gzaiel,

Azaza

et al. 2024

Eur J Inorg Chem

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The development of multifunctional materials is an exceptional research area, which is aimed at enhancing the versatility of materials according to their wide fields of application. Special interest was devoted here to the orthophosphate compound, in particular, the olivine NaMnPO4 material. This compound was successfully synthesized by a solid‐state method and characterized using various techniques. Preliminary room‐temperature structural analysis evidences the sample formation in the orthorhombic structure and its phase purity. The material’s morphology, analyzed by scanning electron microscopy (SEM), is identified by a spherical grain size distribution. The average grain size of the sample was estimated to be around 420 nm. Moreover, the optical investigation of UV‐visible spectroscopy has revealed that the band gap for our sample is (Eg = 2.28 eV), which shows that our compound is a potential candidate for optoelectronic applications. The electrical behavior study's main results confirm the ferroelectric character of the sample and support the aim of deepening the knowledge of the material according to its thermally stimulated conduction processes through impedance spectroscopy. Electrical studies revealed the dominant transport processes across various temperature and frequency ranges, leading to the NSPT model. The frequency dependency relates to frequency‐dispersive dielectric spectra, conduction mechanisms, and relaxation phenomena.

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Improving the optical, electrical and dielectric characteristics of ZnO nanoparticles through (Fe + Al) addition for optoelectronic applications

Cited by 27 publications

References 56 publications

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

Al³⁺-modified ZnO thin film sensor fabricated by the sputtering method: Characterization and a carbon monoxide gas detection study

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄

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Improving the optical, electrical and dielectric characteristics of ZnO nanoparticles through (Fe + Al) addition for optoelectronic applications

Cited by 27 publications

References 56 publications

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

Al3+-modified ZnO thin film sensor fabricated by the sputtering method: Characterization and a carbon monoxide gas detection study

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO4

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Al³⁺-modified ZnO thin film sensor fabricated by the sputtering method: Characterization and a carbon monoxide gas detection study

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄